TY - JOUR
T1 - Trinuclear and Mononuclear Lanthanoid Complexes Containing 2-Methyl-8-quinolinolate
T2 - Synthesis, Structures, and Magnetic Properties
AU - Ghazali, Nurul F.
AU - Phonsri, Wasinee
AU - Murray, Keith S.
AU - Junk, Peter C.
AU - Deacon, Glen B.
AU - Turner, David R.
PY - 2019/6/2
Y1 - 2019/6/2
N2 - Two series of new lanthanoid complexes containing 2-methyl-8-quinolinolate (MQ–) have been prepared at elevated temperatures. Lighter elements yield trinuclear complexes [Ln3(MQ)9(HMQ)]·5H2O·3MeOH (1Ln, where Ln = Pr, Eu, Gd, Tb, Dy and Ho) by solvothermal reactions, and heavier lanthanoids yield the mononuclear complexes [Ln(MQ)3(HMQ)]·HMQ·MeOH (2Ln, where Ln = Dy, Ho, Er and Yb), with overlap between the two series found in the cases of Dy and Ho. Magnetic studies reveal that 1Tb, 1Dy, and 2Er show distinct slow magnetic relaxation under external DC fields. The magnetic data for 1Gd yielded the J value for weak antiferromagnetic coupling and the magnetocaloric –ΔSm value of 20 J kg–1 K–1 at 2 K and ΔH = 5 T.
AB - Two series of new lanthanoid complexes containing 2-methyl-8-quinolinolate (MQ–) have been prepared at elevated temperatures. Lighter elements yield trinuclear complexes [Ln3(MQ)9(HMQ)]·5H2O·3MeOH (1Ln, where Ln = Pr, Eu, Gd, Tb, Dy and Ho) by solvothermal reactions, and heavier lanthanoids yield the mononuclear complexes [Ln(MQ)3(HMQ)]·HMQ·MeOH (2Ln, where Ln = Dy, Ho, Er and Yb), with overlap between the two series found in the cases of Dy and Ho. Magnetic studies reveal that 1Tb, 1Dy, and 2Er show distinct slow magnetic relaxation under external DC fields. The magnetic data for 1Gd yielded the J value for weak antiferromagnetic coupling and the magnetocaloric –ΔSm value of 20 J kg–1 K–1 at 2 K and ΔH = 5 T.
KW - Lanthanide contraction
KW - Lanthanides
KW - Magnetic properties
KW - Quinaldinolate
KW - Structure elucidation
UR - http://www.scopus.com/inward/record.url?scp=85066500946&partnerID=8YFLogxK
U2 - 10.1002/ejic.201900293
DO - 10.1002/ejic.201900293
M3 - Article
AN - SCOPUS:85066500946
SN - 1434-1948
VL - 2019
SP - 2549
EP - 2557
JO - European Journal of Inorganic Chemistry
JF - European Journal of Inorganic Chemistry
IS - 20
ER -